Intelligent collaborative treatment control method and system for modified asphalt production waste gas

Abstract

The application provides a modified asphalt production waste gas intelligent collaborative treatment control method and system, and relates to the technical field of intelligent control. The method comprises the following steps: collecting multiple-source waste gas through independent negative pressure suction of the modified asphalt production link to be treated, performing three-stage gradient purification treatment on the multiple-source waste gas, discharging the purified gas through a chimney, detecting the emission concentration in real time through a sensor array, taking the detection value as a feedback signal, performing multivariate decoupling operation on multiple process parameters in the purification process, and performing collaborative optimization control on the three-stage gradient purification treatment and a main fan. The technical problem of excessive treatment energy consumption or insufficient treatment emission exceeding the standard caused by the mismatch between the treatment intensity and the working condition change due to the independent operation of each purification unit after the simple mixing and centralized treatment of the multiple-source waste gas in the prior art is solved. The technical effects of stable and standard emission of the modified asphalt waste gas, improved waste gas treatment energy efficiency and operation safety are achieved.

Description

Technical Field

[0001] This invention relates to the field of intelligent control technology, specifically to an intelligent collaborative treatment and control method and system for modified asphalt production waste gas. Background Technology

[0002] During the production of modified asphalt, complex waste gases containing asphalt fumes, polycyclic aromatic hydrocarbons (PAHs) such as benzo[a]pyrene, volatile organic compounds (VOCs), and dust are emitted from multiple stages, including tank area breathing, workshop grinding, loading arms, and emulsified asphalt production. The characteristics of the waste gases from different pollution-generating stages differ significantly. Tank area waste gases can reach temperatures of 120-180℃ and have high concentrations, while loading arms waste gases are low-concentration air at room temperature. Emulsification zone waste gases contain irritating components such as ammonia. Traditional treatment methods typically involve simply mixing the waste gases from each stage and sending them all at once to a purification device. However, this crude collection method ignores the significant differences in temperature, humidity, oxygen content, and pollutant concentrations among the various waste gases. The resulting temperature fluctuations and abrupt changes in composition after mixing can easily impact subsequent purification equipment.

[0003] Furthermore, in the purification process, existing equipment mostly operates with fixed process parameters such as spraying and activated carbon adsorption. There is a lack of information exchange and coordinated operation between the various treatment units. Operators often rely solely on experience to set the fan frequency and spray volume, making it difficult to adjust the treatment intensity in real time according to the dynamic changes in the waste gas conditions. When the production load decreases, it still operates at full load, resulting in a large amount of electrical energy and reactive power loss. When the production load suddenly increases or the waste gas composition fluctuates drastically, the treatment capacity under fixed parameters may be insufficient, leading to excessive emission concentrations.

[0004] In summary, existing technologies typically involve simple mixing and centralized treatment of multi-source waste gases, with each purification unit operating independently. This leads to a mismatch between treatment intensity and operating condition changes, resulting in technical problems such as high energy consumption from over-treatment or excessive emissions from under-treatment. Summary of the Invention

[0005] The purpose of this application is to provide an intelligent collaborative treatment and control method and system for modified asphalt production waste gas, which solves the technical problems of existing technologies that typically involve simple mixing and centralized treatment of multi-source waste gas, with each purification unit operating independently, resulting in a mismatch between treatment intensity and operating conditions, leading to high energy consumption from over-treatment or excessive emissions from under-treatment.

[0006] In view of the above problems, this application provides an intelligent collaborative treatment and control method and system for modified asphalt production waste gas.

[0007] The first aspect of this application provides an intelligent collaborative treatment and control method for modified asphalt production waste gas. This method includes: independently collecting waste gas from the modified asphalt production process under negative pressure to obtain multi-source waste gas; performing three-stage purification treatment on the multi-source waste gas to obtain treated clean gas; introducing the treated clean gas into a downstream main fan and discharging it at high altitude through a chimney, with a sensor array installed at the chimney outlet; real-time monitoring of the emission concentration at the chimney outlet using the sensor array, using the detected values ​​as feedback signals, performing multivariate decoupling calculations in conjunction with multiple process parameters during the purification process, and performing collaborative optimization control of the three-stage purification process and the main fan based on the decoupling calculation results until the emission concentration remains stable within a preset range.

[0008] Optionally, negative pressure branch pipes with independent opening and closing control functions are installed in the modified tank area branch pipe, modified workshop branch pipe, loading arm branch pipe, and emulsified asphalt production area branch pipe; the flue gas collected from the modified tank area branch pipe and the modified workshop branch pipe is cooled and condensed by the water-cooled cooler of its respective branch pipe, and the cooled flue gas from the modified tank area, the modified workshop, and the flue gas collected from the loading arm branch pipe are respectively connected to the exhaust gas main pipe through the negative pressure branch pipes equipped with electric butterfly valves; by adjusting The opening degree of the electric butterfly valves of each branch is controlled to regulate the airflow ratio of the three exhaust gas lines: the modified tank area branch, the modified workshop branch, and the loading arm branch, so that the temperature of the mixed exhaust gas in the exhaust gas main pipe is maintained within a preset temperature range. The flue gas collected from the emulsified asphalt production area branch is used as an independent gas source. The corresponding electric butterfly valves are opened and closed in conjunction with the start and stop signals of the emulsified asphalt production equipment to set the flow rate and merge with the mixed exhaust gas in the exhaust gas main pipe to obtain the multi-source exhaust gas.

[0009] Optionally, the loading operation status signal of the loading arm branch is acquired; when the loading operation status signal indicates no loading operation, the electric butterfly valve of the loading arm branch is closed, the opening degree of the electric butterfly valves of the modified tank area branch and the modified workshop branch is adjusted, and the circulating water flow rate of the corresponding water-cooled cooler is adjusted to maintain the temperature of the mixed exhaust gas in the exhaust gas main pipe within the preset temperature range; when the loading operation status signal indicates loading operation, the electric butterfly valve of the loading arm branch is opened, so that the flue gas collected by the loading arm branch is used as a dilution gas source and flows into the exhaust gas main pipe.

[0010] Optionally, the temperature of the mixed exhaust gas at the inlet of the exhaust gas main is collected; the temperature of the mixed exhaust gas is compared with a preset temperature range; when the temperature of the mixed exhaust gas is higher than the upper limit of the preset temperature range, the opening of the electric butterfly valve of the loading arm branch is increased; if the temperature is still higher than the upper limit of the preset temperature range after reaching the maximum limit, the opening of the electric butterfly valve of the modified tank area branch and the modified workshop branch is decreased, and the circulating water flow of the corresponding water-cooled cooler is increased simultaneously; when the temperature of the mixed exhaust gas is lower than the lower limit of the preset temperature range, the opening of the electric butterfly valve of the loading arm branch is decreased, the opening of the electric butterfly valve of the modified tank area branch and the modified workshop branch is increased, and the circulating water flow of the corresponding water-cooled cooler is decreased simultaneously; when the temperature of the mixed exhaust gas is within the preset temperature range, the current opening of each butterfly valve remains unchanged.

[0011] Optionally, the multi-source waste gas undergoes primary pretreatment by adjusting the liquid-to-gas ratio of the spray to remove dust and oil, resulting in a first treated waste gas. The first treated waste gas is then sent to a wet electrostatic treatment unit for secondary wet electrostatic purification, resulting in a second treated waste gas. Finally, the second treated waste gas is sent to an activated carbon adsorption bed equipped with multiple temperature sensors for tertiary activated carbon adsorption, resulting in the treated clean gas.

[0012] Optionally, the wet electrostatic treatment unit is equipped with a flushing water flow detector and a high-voltage power controller; the flushing water flow of the flushing water flow detector is monitored in real time; the flushing water flow is compared with a preset safe flow threshold; when the flushing water flow is lower than the safe flow threshold, the high-voltage power output of the high-voltage power controller is automatically cut off within a preset time and a flushing water interruption alarm signal is issued; when the flushing water flow recovers to above the safe flow threshold, the high-voltage power output is automatically restored after a preset delay.

[0013] Optionally, temperature distribution data of each region of the activated carbon adsorption bed is acquired through the multi-point temperature sensor; when the temperature value of any region exceeds the first temperature threshold, forced airflow cooling is initiated to increase the gas flow rate through that region to reduce the temperature of the activated carbon adsorption bed; when the temperature value of any region exceeds the second temperature threshold, while maintaining the pumping, atomized medium is added to the activated carbon adsorption bed for spray cooling, and an over-temperature alarm signal is issued; the second temperature threshold is higher than the first temperature threshold.

[0014] Optionally, the emission concentration at the chimney outlet, the exhaust gas temperature at the inlet of the exhaust gas main, the secondary current value of the wet electrostatic treatment unit, and the pressure value inside the exhaust gas main are collected; the emission concentration is used as the emission status feedback quantity, and the exhaust gas temperature, secondary current value, and pressure value are used as collaborative adjustment reference quantities; the emission status feedback quantity is compared with the preset range, and based on the comparison result and the collaborative adjustment reference quantities, a collaborative adjustment command for the three-stage cascade purification treatment and the main fan is generated until the emission status feedback quantity stabilizes within the preset range.

[0015] Optionally, when the emission status feedback is higher than the preset range, a load increase adjustment command is generated to increase the high-voltage power output level of the high-voltage power controller and read the secondary current value. If the secondary current value exceeds the safe discharge range, the high-voltage power output level is locked. When the emission status feedback is lower than the preset range, a load decrease energy saving adjustment command is generated to gradually reduce the high-voltage power output level of the high-voltage power controller and monitor the inlet temperature of the exhaust gas main. If the temperature fluctuation exceeds the allowable range, the high-voltage power output level is locked.

[0016] A second aspect of this application provides an intelligent collaborative treatment and control system for modified asphalt production waste gas. This system includes: a waste gas collection module for independently collecting waste gas from the modified asphalt production process under negative pressure, resulting in multi-source waste gas; a waste gas treatment module for performing three-stage purification treatment on the multi-source waste gas, resulting in treated clean gas; a waste gas emission module for introducing the treated clean gas into a downstream main fan, discharging it at high altitude through a chimney, and installing a sensor array at the chimney emission outlet; and an optimization control module for real-time detection of the emission concentration at the chimney emission outlet using the sensor array, using the detected value as a feedback signal, performing multi-variable decoupling calculations in conjunction with multiple process parameters during the purification process, and performing collaborative optimization control of the three-stage purification process and the main fan based on the decoupling calculation results, until the emission concentration remains stable within a preset range.

[0017] One or more technical solutions provided in this application have at least the following technical effects or advantages: The method provided in this application involves independently collecting multi-source waste gas through negative pressure extraction in the modified asphalt production process; performing three-stage purification on the multi-source waste gas to obtain clean gas; introducing the clean gas into the downstream main fan and discharging it at high altitude through a chimney, with a sensor array installed at the chimney outlet; using the sensor array to monitor the emission concentration at the chimney outlet in real time, using the detected value as a feedback signal, and performing multi-variable decoupling calculations in conjunction with multiple process parameters in the purification process; and coordinating and optimizing the three-stage purification process and the main fan based on the decoupling calculation results until the emission concentration remains stable within a preset range. This achieves the technical effect of stable and compliant emission of modified asphalt waste gas through zoned waste gas collection, three-stage purification, and multi-parameter coordinated feedback control, while simultaneously improving waste gas treatment efficiency and operational safety.

[0018] The above description is merely an overview of the technical solution of this application. To better understand the technical means of this application and to facilitate its implementation according to the description, and to make the above and other objects, features, and advantages of this application more apparent, specific embodiments of this application are described below. It should be understood that the content described in this section is not intended to identify key or important features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent through the following description. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0020] Figure 1 A flowchart illustrating an intelligent collaborative treatment and control method for modified asphalt production waste gas provided in this application.

[0021] Figure 2 The flow rate variation curve is shown in the intelligent collaborative treatment and control method for modified asphalt production waste gas provided in this application.

[0022] Figure 3 This is a schematic diagram of the structure of an intelligent collaborative treatment and control system for modified asphalt production waste gas provided in this application.

[0023] Explanation of reference numerals in the attached diagram: 11. Waste gas collection module; 12. Waste gas treatment module; 13. Waste gas emission module; 14. Optimization control module. Detailed Implementation

[0024] This application provides an intelligent collaborative treatment and control method and system for modified asphalt production waste gas. It addresses the technical problems of existing technologies that typically involve simple mixing and centralized treatment of multi-source waste gas, with each purification unit operating independently. This leads to a mismatch between treatment intensity and operating conditions, resulting in either excessive energy consumption from overtreatment or excessive emissions from undertreatment. The method achieves stable and compliant emissions of modified asphalt waste gas through zoned waste gas collection, three-stage purification, and multi-parameter collaborative feedback control, while simultaneously improving waste gas treatment energy efficiency and operational safety.

[0025] The technical solutions of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. It should be understood that the present invention is not limited to the exemplary embodiments described herein. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. It should also be noted that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, not all of them.

[0026] Example 1 like Figure 1 As shown, this application provides an intelligent co-treatment and control method for modified asphalt production waste gas, which includes: The modified asphalt production process to be treated is independently vacuumed and collected to obtain multi-source waste gas.

[0027] Furthermore, the modified asphalt production process is subjected to independent negative pressure extraction and collection to obtain multi-source waste gas, including: negative pressure branch pipes with independent opening and closing control functions are installed in the modified tank area branch pipe, modified workshop branch pipe, loading arm branch pipe, and emulsified asphalt production area branch pipe; the flue gas collected from the modified tank area branch pipe and the modified workshop branch pipe is cooled and condensed by water-cooled coolers in their respective branches; the cooled flue gas from the modified tank area, the modified workshop, and the flue gas collected from the loading arm branch pipe are then respectively passed through electrically powered... The negative pressure branch pipe of the butterfly valve merges into the exhaust gas main pipe; by adjusting the opening degree of the electric butterfly valves of each branch, the air intake flow ratio of the three exhaust gas lines of the modified tank area branch, the modified workshop branch, and the loading arm branch is controlled, so that the temperature of the mixed exhaust gas in the exhaust gas main pipe is maintained within the preset temperature range; the flue gas collected from the emulsified asphalt production area branch is used as an independent gas source, and the corresponding electric butterfly valve is opened and closed in conjunction with the start and stop signals of the emulsified asphalt production equipment to set the flow rate and merge with the mixed exhaust gas in the exhaust gas main pipe to obtain the multi-source exhaust gas.

[0028] Specifically, the modified asphalt production process includes branch lines for the modified tank area, the modified workshop, the loading arm, and the emulsified asphalt production area. Each of these branch lines is equipped with a negative pressure branch with independent opening and closing control. Each negative pressure branch is also equipped with a pressure transmitter and a temperature sensor to monitor the suction negative pressure and exhaust gas temperature in real time. Specifically, the modified tank area branch collects high-temperature, high-concentration organic waste gas escaping from the breather valve and top of the asphalt modification reaction tank; the modified workshop branch collects medium-temperature, dusty, and oily waste gas from the grinding mill and colloid mill; the loading arm branch collects low-concentration, ambient-temperature waste gas escaping from the sealed interface between the loading arm and the tank truck during the loading of liquid modified asphalt; and the emulsified asphalt production area branch collects ammonia / VOC-containing waste gas escaping from the emulsifier mixing tank, colloid mill, and finished product storage tank.

[0029] The flue gas collected from the modified tank area branch and the modified workshop branch is introduced into the water-cooled cooler installed in their respective branches to cool and condense the high-temperature flue gas of 120~180℃. The water-cooled cooler is equipped with a chilled water or circulating water regulating valve and an outlet water temperature monitoring device. The flue gas outlet temperature is controlled within the range of 60±5℃ by adjusting the circulating water flow. The cooled flue gas from the modified tank area and the modified workshop, along with the flue gas collected from the loading arm branch, are channeled into the main exhaust pipe through negative pressure branch pipes equipped with electric butterfly valves. A multi-point average temperature sensor is installed at the inlet of the main exhaust pipe. This sensor consists of three Pt100 platinum resistance thermometers evenly distributed along the pipe's cross-section. The arithmetic average is used as the mixed temperature characterization value. By adjusting the opening of the electric butterfly valves in each branch, the inlet flow ratio of the three exhaust gas branches (modified tank area branch, modified workshop branch, and loading arm branch) is controlled, maintaining the mixed exhaust gas temperature in the main exhaust pipe within a preset temperature range of 35℃ to 55℃. The lower limit is approximately 25℃ to 30℃ higher than the dew point temperature of water vapor and light organic components in the exhaust gas to prevent condensation from corroding pipes and equipment. The upper limit is lower than the safe operating requirement of the wet electrostatic treatment unit for an inlet temperature ≤60℃.

[0030] The flue gas collected from the branch road of the emulsified asphalt production area is used as an independent gas source. A corresponding electric butterfly valve opens and closes in conjunction with the start / stop signals of the emulsified asphalt production equipment. When the equipment starts, the valve automatically opens to a set flow rate. This set flow rate corresponds to a preset fixed opening degree, which is calibrated to 55%–65% of the design air volume, corresponding to a standard flow rate of approximately 800–1200 m³ / h. 3The flow rate is controlled at a rate of / h to ensure that the controlled air velocity at the hood in the colloid mill and mixing tank areas is not lower than 0.5m / s, while preventing significant disturbances to the temperature and proportioning of the main pipe due to excessive flow. When the emulsified asphalt production equipment is shut down, the electric butterfly valve automatically closes to avoid wasting the main fan's energy on dry pumping. The exhaust gas from the branch lines of the emulsified asphalt production area is combined with the temperature- and proportioning-adjusted mixed exhaust gas at the end of the main exhaust pipe at a set flow rate, ultimately forming a multi-source exhaust gas with relatively stable composition, temperature, and flow rate.

[0031] By collecting exhaust gases independently in different zones, the efficiency of exhaust gas collection at each pollution-generating stage is ensured from the source. By independently cooling the flue gas collected from the modified tank area branch and the modified workshop branch, and mixing and summarizing the flue gas collected from the loading arm branch, the multiple exhaust gases with different temperatures are mixed and stabilized within the preset temperature range. This not only prevents thermal damage from high-temperature flue gas, but also avoids condensate precipitation and equipment corrosion caused by excessive cooling. At the same time, the follow-up opening and closing control of exhaust gas in the emulsified asphalt area effectively reduces energy consumption.

[0032] Furthermore, by adjusting the opening degree of the electric butterfly valves of each branch, the intake flow ratio of the three exhaust gas lines—the modified tank area branch, the modified workshop branch, and the loading arm branch—is controlled, so that the temperature of the mixed exhaust gas in the exhaust gas main pipe is maintained within a preset temperature range. This includes: acquiring the loading operation status signal of the loading arm branch; when the loading operation status signal indicates no loading operation, closing the electric butterfly valve of the loading arm branch, adjusting the opening degree of the electric butterfly valves of the modified tank area branch and the modified workshop branch, and adjusting the circulating water flow of the corresponding water-cooled cooler to maintain the temperature of the mixed exhaust gas in the exhaust gas main pipe within the preset temperature range; when the loading operation status signal indicates loading operation, opening the electric butterfly valve of the loading arm branch, so that the flue gas collected by the loading arm branch is used as a dilution gas source and flows into the exhaust gas main pipe.

[0033] Furthermore, when the loading operation status signal indicates that loading operation has occurred, the method further includes: collecting the temperature of the mixed exhaust gas at the inlet of the exhaust gas main; comparing the mixed exhaust gas temperature with a preset temperature range; when the mixed exhaust gas temperature is higher than the upper limit of the preset temperature range, increasing the opening of the electric butterfly valve of the loading arm branch; if the temperature is still higher than the upper limit of the preset temperature range after reaching the maximum limit, decreasing the opening of the electric butterfly valves of the modified tank area branch and the modified workshop branch, and simultaneously increasing the circulating water flow of the corresponding water-cooled cooler; when the mixed exhaust gas temperature is lower than the lower limit of the preset temperature range, decreasing the opening of the electric butterfly valve of the loading arm branch, increasing the opening of the electric butterfly valves of the modified tank area branch and the modified workshop branch, and simultaneously decreasing the circulating water flow of the corresponding water-cooled cooler; when the mixed exhaust gas temperature is within the preset temperature range, keeping the current opening of each butterfly valve unchanged.

[0034] Specifically, the loading operation status signal of the loading arm branch is obtained from the anti-overflow electrostatic grounding controller installed on the loading arm. This anti-overflow electrostatic grounding controller integrates a liquid level anti-overflow probe and an electrostatic grounding clamp. When the loading arm is successfully connected to the tank truck and the grounding resistance is within acceptable limits, and the liquid level is not exceeded, the internal relay of the anti-overflow electrostatic grounding controller activates, outputting a 220V AC active switching signal to indicate that loading is in progress or has been completed. When the loading arm detaches from the tank truck or the grounding resistance exceeds the limit, the internal relay of the anti-overflow electrostatic grounding controller releases, and the output signal disappears, indicating that no loading operation is underway.

[0035] When the loading operation status signal indicates no loading operation, a full-close command is sent to the electric butterfly valve of the loading arm branch, outputting a 4mA signal corresponding to 0% opening, completely cutting off the loading arm branch and switching to a two-path regulation mode. This mode only adjusts the opening of the electric butterfly valves in the modified tank area branch and the modified workshop branch, and simultaneously adjusts the corresponding water-cooled cooler circulating water flow rate to maintain the mixed exhaust gas temperature in the exhaust gas main within the preset temperature range. Specifically, the control logic is as follows: The average temperature at multiple points at the exhaust gas main inlet is read in real time and compared with the preset temperature range. When the average temperature at multiple points exceeds the upper limit of 55℃, a cooling operation sequence is executed. The opening of the electric butterfly valves in the modified tank area branch and the modified workshop branch is reduced, with each adjustment step of 2% to 5% to reduce the source of high-temperature exhaust gas. The opening of the corresponding circulating water regulating valve of the water-cooled cooler is increased to increase the circulating cooling water flow rate, so that the exhaust gas is further cooled when passing through the water-cooled cooler until the temperature of the mixed exhaust gas in the exhaust gas main pipe is maintained within the preset temperature range. Each step of 2% to 5% means that the valve opening command is increased or decreased by 2% to 5% of the original absolute opening value in each control cycle. When the average temperature at multiple points is below the lower limit of 35℃, the following heating operation sequence is executed: reduce the opening of the electric butterfly valves in the modified tank area branch and the modified workshop branch, while reducing the total amount of fully cooled exhaust gas entering the main pipe, and simultaneously closing the circulating water regulating valve of the water-cooled cooler to reduce heat exchange, so that the exhaust gas outlet temperature rises until the temperature of the mixed exhaust gas in the exhaust gas main pipe is maintained within the preset temperature range, then exit the current regulation state, keep the current opening of each butterfly valve unchanged, and continue to monitor the temperature of the mixed exhaust gas at a fixed sampling period, such as 500ms. When the temperature of the mixed exhaust gas exceeds the preset range again, the corresponding regulation sequence is automatically re-triggered.

[0036] When the loading operation status signal indicates that loading is underway, a three-way coordinated control strategy is adopted. First, the temperature of the mixed exhaust gas at the inlet of the exhaust gas main is collected, i.e., the average temperature at multiple points. Then, the temperature of the mixed exhaust gas is compared with a preset temperature range. When the temperature of the mixed exhaust gas is higher than the upper limit of the preset temperature range, the opening of the electric butterfly valve of the loading arm branch is increased, with each step being 1% to 2%. The flue gas collected in the loading arm branch is used as a dilution gas source and incorporated into the exhaust gas main. The dilution gas source refers to the characteristic that the temperature of the exhaust gas in this path is significantly lower than that of the high-temperature exhaust gas. By introducing it as a low-temperature medium, the overall temperature of the mixed exhaust gas is reduced through physical mixing, thereby achieving an energy-saving temperature regulation effect of waste cooling without consuming additional cooling capacity. When the opening of the electric butterfly valve of the loading arm branch reaches its maximum limit, if the temperature of the mixed exhaust gas is still higher than the upper limit of the preset temperature range, the opening of the electric butterfly valves of the modified tank area branch and the modified workshop branch is reduced, with each step being 3% to 5%, and the circulating water flow rate of the corresponding water-cooled cooler is increased simultaneously. When the temperature of the mixed exhaust gas is lower than the lower limit of the preset temperature range, the opening of the electric butterfly valve on the loading arm branch should be reduced first, in increments of 3% to 5%, to decrease the amount of low-temperature dilution gas introduced. If the electric butterfly valve on the loading arm branch is already closed to its minimum opening of 5%, which is the minimum opening required to maintain the negative pressure seal of the pipeline, and the temperature of the mixed exhaust gas is still lower than the lower limit of the preset temperature range, the opening of the electric butterfly valves on the modified tank area branch and the modified workshop branch should be increased, and the circulating water flow rate of the corresponding water-cooled cooler should be reduced simultaneously. When the temperature of the mixed exhaust gas is within the preset temperature range, the current opening of each electric butterfly valve should remain unchanged.

[0037] For example, a modified asphalt production unit is in normal operation: the temperature of one batch of material in the modified tank area is approximately 160°C. After the exhaust gas at its breather valve is cooled by the water-cooled cooler in the tank area branch, the measured outlet temperature is 58°C. The current opening degree of the branch electric butterfly valve is 45%, corresponding to a standard flow rate of approximately 1800 m³ / s. 3 / h; The flue gas escaping from the colloid mill area in the modification workshop is cooled to approximately 52℃ by the workshop's water-cooled cooler, corresponding to a butterfly valve opening of 35% and a flow rate of approximately 1400m³ / h. 3 / h; At this time, a tanker truck is positioned at the loading arm, and the anti-overflow static grounding controller outputs a connection signal, indicating that loading operations have commenced. The butterfly valve on the loading arm branch is open, currently at 30%, introducing ambient temperature exhaust gas at approximately 32°C and a flow rate of approximately 2200 m³ / h. 3 / h. After the three exhaust gases are mixed in the main exhaust pipe, the average temperature value at multiple points is read, i.e., the mixed exhaust gas temperature is 46.5℃, which is within the preset range of 35~55℃, and the current opening degree of each valve remains unchanged. At the same time, the emulsified asphalt production equipment is running, and its main motor contactor auxiliary contact closes, opening the electric butterfly valve of the emulsification zone branch to the preset 60% opening degree, introducing approximately 1000m 3 The total flow rate of ammonia-containing waste gas from various sources is approximately 6400 m³ / h. 3The mixing temperature stabilizes at 46.5℃ per hour. Once the loading arm operation is complete and the grounding controller signal is disconnected, the electric butterfly valve on the loading arm branch is closed to 5% to maintain a seal. The mixing temperature in the main pipe will gradually rise, reaching 56.8℃ after 3 minutes, exceeding the upper limit of 55℃. At this point, the butterfly valves on the modified tank area and workshop branch are adjusted, closing by 1% every 20 seconds to increase the corresponding water-cooled cooler's circulating water flow. A 4-20mA signal is used to increase the valve opening from 60% to 80% until the mixing temperature returns to the preset temperature range. This dynamic adjustment process is fully automatic and requires no manual intervention.

[0038] By using the exhaust gas from the loading arm as an active temperature control medium, the temperature of the mixed exhaust gas is controlled without increasing the energy consumption of any external cold source. By differentiating between loading and unloading conditions and adopting differentiated control strategies, the ineffective energy consumption caused by drawing in a large amount of air when there is no loading is avoided. At the same time, it ensures that the exhaust gas from this branch can be used for effective cooling when there is loading, thus achieving precise control that adapts to the operating conditions. Furthermore, through the hierarchical control logic of prioritizing electric butterfly valve adjustment and supplementing with circulating water flow, energy consumption is reduced while improving the effectiveness and steady-state accuracy of temperature control.

[0039] The multi-source waste gas is subjected to a three-stage cascade purification process to obtain clean gas.

[0040] Furthermore, the multi-source waste gas is subjected to a three-stage purification process to obtain clean gas, including: performing a first-stage pretreatment on the multi-source waste gas by adjusting the liquid-to-gas ratio of the spray to remove dust and oil, resulting in a first-stage treated waste gas; sending the first-stage treated waste gas into a wet electrostatic treatment unit for a second-stage wet electrostatic purification process, resulting in a second-stage treated waste gas; and sending the second-stage treated waste gas into an activated carbon adsorption bed equipped with multiple temperature sensors for a third-stage activated carbon adsorption process, resulting in the clean gas obtained after purification.

[0041] Specifically, the obtained multi-source waste gas undergoes a three-stage purification process. First, a primary pretreatment stage is performed. This stage controls the washing intensity by adjusting the spray liquid-to-gas ratio in the scrubbing tower—the ratio of the spray liquid volumetric flow rate to the standard state volumetric flow rate of the waste gas per unit time. This process removes dust and oil from the multi-source waste gas. The spray liquid-to-gas ratio is set based on the following: when the dust concentration in the multi-source waste gas is high, the spray liquid-to-gas ratio is adjusted to 1.5~2.5 L / m³. 3 To improve capture efficiency, when multi-source exhaust gas is mainly composed of gaseous pollutants, the liquid-to-gas ratio of the spray can be reduced to 0.8~1.2 L / m³. 3 To reduce the energy and water consumption of the circulating pump, the first-stage waste gas is obtained after primary washing treatment.

[0042] The first-stage waste gas is piped into a wet electrostatic precipitator unit for secondary wet electrostatic purification. The wet electrostatic precipitator unit uses a high-voltage DC power supply to apply a high-voltage electric field between the discharge electrode and the collecting electrode, ionizing and charging tar droplets, aerosols, and submicron particles in the first-stage waste gas. The charged particles migrate towards the collecting electrode under Coulomb force and are captured, aggregating to form a liquid film that flows downwards along the electrode plates under gravity. Simultaneously, a flushing water pump is installed at the top of the wet electrostatic precipitator unit. The pump includes a water supply pipe and a solid conical nozzle above each anode tube. The flushing water pressure is 0.3~0.5 MPa, used to periodically spray water to flush the deposits on the electrode plate surface to the bottom collection tank for discharge. After the secondary wet electrostatic purification process, the second-stage waste gas is obtained. The second waste gas is then sent to a tertiary activated carbon adsorption unit. The core equipment of the tertiary activated carbon adsorption unit is the activated carbon adsorption bed, which is equipped with multiple temperature sensors. After the second waste gas undergoes tertiary activated carbon adsorption treatment through the activated carbon adsorption bed, clean gas is obtained.

[0043] The three-stage cascade purification treatment follows the order of processing precision from coarse to fine and pollutant particle size from large to small. It sequentially sets up three stages of processes: spray washing, wet electrostatic precipitation, and activated carbon adsorption. This enables the precise removal of multi-source waste gas with different particle sizes and physical states of pollutants at each stage, thereby improving the waste gas purification effect.

[0044] Furthermore, the first treated waste gas is sent to a wet electrostatic treatment unit for secondary wet electrostatic purification to obtain the second treated waste gas. The process also includes: the wet electrostatic treatment unit is equipped with a flushing water flow detector and a high-voltage power controller; the flushing water flow rate of the flushing water flow detector is monitored in real time; the flushing water flow rate is compared with a preset safe flow threshold; when the flushing water flow rate is lower than the safe flow threshold, the high-voltage power output of the high-voltage power controller is automatically cut off within a preset time, and a flushing water flow interruption alarm signal is issued; when the flushing water flow rate recovers to above the safe flow threshold, the high-voltage power output is automatically restored after a preset delay.

[0045] Specifically, the wet electrostatic precipitator unit is also equipped with a flushing water flow detector and a high-voltage power controller. The flushing water flow detector uses an electromagnetic flow meter to obtain the real-time flushing water flow rate. The flushing water flow rate refers to the actual volumetric flow rate through the main flushing water pipe per unit time, representing the sufficiency of the flushing water spray supply to the dust collecting electrode surface. The flushing water flow rate is compared with a preset safe flow rate threshold. The preset safe flow rate threshold is determined during the process design stage based on the equipment specifications of the wet electrostatic precipitator unit to ensure that the dust collecting electrode surface is completely covered by a water film under all operating conditions, avoiding the formation of local dry areas. The value range is typically 40% to 60% of the rated flushing water flow rate, for example, a rated flow rate of 4.0 m³ / h. 3 When the flow rate is / h, the safe flow threshold is set to 1.8~2.5m. 3 / h.

[0046] When the flushing water flow rate is less than the safe flow rate threshold, the flushing water flow rate is continuously monitored for a preset time. If the flushing water flow rate recovers to the safe flow rate threshold within 3-5 seconds within the preset time, no power-off action is triggered. If the flushing water flow rate remains below the safe flow rate threshold for the preset time, a genuine flushing water interruption fault is determined, and the high-voltage power output of the high-voltage power controller is automatically cut off, executing the power-off action. After the cause of the flushing water interruption fault is eliminated, such as the operator cleaning the clogged Y-type filter, restarting the tripped flushing water pump or turning on the standby pump, or repairing the leaking pipe flange, the flushing water flow rate collected by the flushing water flow detector gradually recovers. The flushing water flow rate is compared with the safe flow rate threshold. When the flushing water flow rate remains consistently above the safe flow rate threshold and the preset delay time is reached, the high-voltage power output is automatically restored.

[0047] For example, the flow rate change curve is as follows: Figure 2 As shown by the solid black line with a hollow circle, the black dashed line indicates the safe flow threshold. Under normal operating conditions, the wet electrostatic treatment unit's flushing water pump operates at its rated frequency of 50Hz, and the flushing water flow detector's feedback signal corresponds to a flushing water flow rate of 3.8m³ / h. 3 / h, safe flow threshold Qset=2.0m 3 The current high-voltage power supply output voltage is 55kV. The flushing water flow rate of 3.8 m³ / h is greater than or equal to the safe flow threshold of 2.0 m³ / h, meeting the conditions for normal operation. However, due to long-term lack of cleaning, the Y-type filter at the inlet of the flushing water pipe has become gradually clogged with impurities, increasing pipe resistance and causing the flushing water flow rate to decrease from 3.8 m³ / h. 3 / h gradually decreased to 3.1m 3 / h, 2.6m 3 / h, 2.2m 3 / h, 1.8m 3 / h, at t=8 seconds, the flushing water flow rate is 1.8m.3 / h<Qset, enter the fault monitoring phase. Then continuously monitor the flushing water flow within the preset time of 4 seconds, and the subsequent readings per second are sequentially 1.5m 3 / h, 1.3m 3 / h, 1.2m 3 / h, 1.1m 3 / h, all lower than the safety flow threshold of 2.0m 3 / h. At this point, it is determined that the fault actually occurs, and a 4mA signal is immediately output to the analog control terminal of the high-voltage power supply controller, so that the output voltage of the high-voltage power supply decays from 55kV to 0kV, cutting off the high-voltage output to ensure the safety of intelligent collaborative waste gas treatment control.

[0048] Through the automatic interlock mechanism of cutting off power immediately upon flow interruption, the risk of electric field local distortion, spark discharge, and even ignition of flammable components in the waste gas such as benzene series and hydrogen caused by tar and dust drying and scaling on the plate surface of the wet electrostatic precipitator under the condition of flushing water cut-off is eliminated, and the safety of intelligent collaborative waste gas treatment control is improved. Through the preset time and preset delay, misoperations caused by non-fault factors such as pipeline pressure fluctuation and bubble interference are effectively filtered, the adverse impact of frequent false shutdowns on production continuity and purification efficiency is avoided while ensuring safety, and the operation reliability and maintainability of modified asphalt production waste gas treatment are improved.

[0049] Further, sending the second treated waste gas into an activated carbon adsorption bed equipped with multi-point temperature sensors for three-stage activated carbon adsorption treatment to obtain the treated clean gas includes: acquiring temperature distribution data of each area of the activated carbon adsorption bed through the multi-point temperature sensors; when the temperature value of any area exceeds the first temperature threshold, starting forced air flow cooling, increasing the gas flow passing through this area to reduce the temperature of the activated carbon adsorption bed; when the temperature value of any area exceeds the second temperature threshold, while maintaining exhaust, adding atomized medium to the activated carbon adsorption bed for spray cooling, and issuing an over-temperature alarm signal; the second temperature threshold is higher than the first temperature threshold.

[0050] Specifically, during the process of sending the second treated waste gas into the activated carbon adsorption bed for three-stage activated carbon adsorption treatment, the temperature data of each area of the activated carbon adsorption bed are collected through the multi-point temperature sensors distributed along the waste gas flow direction and the geometric position of the bed section inside the activated carbon adsorption bed, so as to form temperature distribution data. For example, the bed is divided into three axial areas along the waste gas flow direction: the inlet end area, the middle reaction area and the outlet end area. In each axial area, 3~5 measuring points are evenly distributed along the radial direction of the bed section, and each measuring point is equipped with a platinum thermal resistance temperature sensor.

[0051] Based on the thermophysical properties and safe operation requirements of activated carbon, a first temperature threshold and a second temperature threshold are preset, with the second temperature threshold being higher than the first. For example, considering that the upper limit of the safe operating temperature for activated carbon when adsorbing organic solvents, such as benzene compounds and alkanes, is typically ≤60~70℃, exceeding this temperature causes the adsorption exothermic rate to increase exponentially. Simultaneously, the organic matter adsorbed on the activated carbon surface begins to undergo slow dehydrogenation and oxidation side reactions, releasing additional heat of reaction and forming a positive feedback loop. If not intervened in time, this may develop into thermal runaway. Therefore, the first temperature threshold T1 is set to 65℃. Meanwhile, considering that the auto-ignition critical temperature of columnar coal-based granular activated carbon is typically between 80~100℃, the second temperature threshold T2 is set to 85℃.

[0052] When the temperature at any measuring point within any area exceeds the first temperature threshold, forced airflow cooling measures are immediately and automatically activated. This increases the gas flow rate through the area, forcibly expelling the heat accumulated in the bed by enhancing convective heat transfer efficiency, thereby reducing the temperature of the activated carbon adsorption bed. When the temperature at any measuring point within any area exceeds the second temperature threshold, the high-frequency operation of the terminal main fan is maintained and locked for exhaust, ensuring that the activated carbon adsorption bed always maintains a negative pressure environment, typically -0.5 kPa to -1.0 kPa. This prevents high-temperature flue gas or potential combustion products from overflowing into the operating area and also helps reduce the partial pressure of oxygen between activated carbon particles, inhibiting the combustion reaction. Simultaneously, an opening command is sent to the solenoid valve of the atomizing spray device installed on the top or side of the activated carbon adsorption bed. After the solenoid valve is energized and opened, the atomizing medium with a pressure of 0.6~0.8MPa, such as demineralized water or industrial water, is sprayed out through the high-pressure atomizing nozzle to form a fine water mist that evenly covers the overheated area for spraying and cooling, and an overheating alarm signal is issued. For example, the audible and visual alarm set in the activated carbon adsorption bed area is activated to issue an audible and visual alarm signal, and the activated carbon adsorption bed overheating alarm signal is sent to the host computer distributed control system (DCS) via industrial Ethernet. The DCS system displays a red emergency alarm window on the operator station interface in the central control room, ensuring that the on-site operators and the on-duty personnel in the central control room are quickly informed of the abnormal temperature of the activated carbon adsorption bed, so as to take timely emergency intervention measures.

[0053] By collecting temperatures in multiple areas of the activated carbon adsorption bed through distributed temperature sensors, the comprehensiveness of monitoring is improved. At the same time, the overheated areas are treated by forced airflow cooling and atomized spray cooling, realizing automatic response to abnormal temperature rise, effectively preventing fire accidents caused by spontaneous combustion of activated carbon, and improving the safety and reliability of the three-stage activated carbon adsorption treatment process.

[0054] The treated clean gas is introduced into the downstream main fan and discharged into the atmosphere through the chimney. A sensor array is installed at the chimney outlet. The emission concentration at the chimney outlet is detected in real time by the sensor array. The detected value is used as a feedback signal and combined with multiple process parameters in the purification process to perform multivariate decoupling calculations. Based on the decoupling calculation results, the three-stage purification process and the main fan are coordinated and optimized until the emission concentration remains stable within a preset range.

[0055] Furthermore, the emission concentration at the chimney outlet is detected in real time using the sensor array. The detected value is used as a feedback signal, and multivariate decoupling calculations are performed in conjunction with multiple process parameters in the purification process. Based on the decoupling calculation results, the three-stage cascade purification process and the main fan are coordinated and optimized until the emission concentration remains stable within a preset range. This includes: collecting the emission concentration at the chimney outlet; collecting the exhaust gas temperature at the inlet of the exhaust gas main pipe; collecting the secondary current value of the wet electrostatic treatment unit; collecting the pressure value inside the exhaust gas main pipe; using the emission concentration as an emission status feedback quantity; using the exhaust gas temperature, secondary current value, and pressure value as coordinated adjustment reference quantities; comparing the emission status feedback quantity with the preset range; and generating coordinated adjustment commands for the three-stage cascade purification process and the main fan based on the comparison results and the coordinated adjustment reference quantities until the emission status feedback quantity stabilizes within the preset range.

[0056] Furthermore, based on the comparison results and the aforementioned coordinated adjustment reference value, coordinated adjustment instructions for the three-stage cascade purification treatment and the main fan are generated, including: when the emission status feedback value is higher than the preset range, a load increase adjustment instruction is generated to increase the high-voltage power output level of the high-voltage power controller and read the secondary current value; if the secondary current value exceeds the safe discharge range, the high-voltage power output level is locked; when the emission status feedback value is lower than the preset range, a load decrease energy saving adjustment instruction is generated to gradually reduce the high-voltage power output level of the high-voltage power controller and monitor the inlet temperature of the exhaust gas main pipe; if the temperature fluctuation exceeds the allowable range, the high-voltage power output level is locked.

[0057] Specifically, the clean gas treated by the activated carbon adsorption bed is drawn out by a downstream main fan, such as a centrifugal fan, and discharged into the atmosphere through a chimney. A sensor array is installed at the chimney outlet, including at least an online non-methane total hydrocarbon analyzer, for real-time monitoring and collection of emission concentrations at the chimney outlet. Simultaneously, multiple process parameters during the purification process are collected, including the exhaust gas temperature at the exhaust gas main inlet, the secondary current value of the wet electrostatic treatment unit obtained based on feedback signals from the high-voltage power controller, and the pressure value within the exhaust gas main pipe obtained from a pressure transmitter installed at the exhaust gas main inlet.

[0058] The emission concentration is used as the emission status feedback quantity, while the exhaust gas temperature, secondary current value, and pressure value are used as reference quantities for coordinated adjustment. The emission status feedback quantity is compared with a preset range, which is a preset emission concentration range jointly determined by environmental standards and enterprise internal control indicators. For example, the upper limit of CH emission concentration is 72~96 mg / m³. 3 Meanwhile, excessively low emission concentrations indicate that the system is over-processing and has high energy consumption. Therefore, a lower limit CL for emission concentration is set, such as 20~30 mg / m³. 3 As the economic operating range, the preset range is [CL, CH], for example, preferably set to [25, 80] mg / m³. 3 .

[0059] When the emission status feedback is within the preset range, emissions are deemed compliant, operation is economical, and multiple process parameters remain constant during purification. When the emission status feedback exceeds the upper limit of the preset range, the emission concentration is deemed too high, generating a load increase adjustment command. This increases the output voltage setpoint by an adjustment step of 1~2kV, determined based on 2%~3% of the total high-voltage power supply adjustment range of 0~72kV. This avoids excessive single adjustment amplitude that could cause electric field breakdown or sudden changes in secondary current, thereby improving the high-voltage power supply output level of the high-voltage power supply controller. After each adjustment of the high-voltage power supply output level, the secondary current value is read, and a safety limit judgment is performed. If the secondary current value is within the safe discharge range, the new output voltage level is maintained, and emission concentration continues to be monitored until the emission concentration remains stable within the preset range. If the secondary current value exceeds the safe discharge range, the high voltage power supply output level will be locked and the voltage will not be increased further to avoid equipment damage or safety accidents caused by blindly increasing the voltage. The safe discharge range refers to the range of secondary current corresponding to the electric field strength between the dust collecting electrode and the discharge electrode being maintained within the corona discharge range, preferably 30% to 90% of the rated current.

[0060] When the emission status feedback is lower than the lower limit of the preset range, it indicates that the processing capacity has a margin but the operating energy consumption is too high. A load reduction energy-saving adjustment command is generated, reducing the output voltage setting by one adjustment step from the current value. The adjustment step is set to 1~2kV or 0.5~1kV to accurately approach the energy-saving target, thereby reducing the intensity of purification treatment and saving energy, while ensuring that the emission concentration does not rise back to the excessive state due to excessive adjustment. While gradually reducing the high-voltage power output level of the high-voltage power controller, the inlet temperature of the exhaust gas main pipe is monitored, and its temperature fluctuation amplitude is calculated. The temperature fluctuation amplitude is the absolute value of the difference between the current exhaust gas main pipe inlet temperature and the sliding average temperature of the exhaust gas main pipe inlet temperature over the past 60 seconds. When the temperature fluctuation amplitude is less than or equal to the allowable fluctuation range, load reduction adjustment is allowed. The high-voltage power output level is gradually reduced according to the set adjustment step. After each reduction, a response stabilization time is waited, usually 60~120 seconds, to observe the emission concentration change trend. The next load reduction is executed only after ensuring that it does not rise back to the excessive range, until the emission concentration remains stable within the preset range. If the temperature fluctuation exceeds the allowable range, lock the high-voltage power supply output level and stop the load reduction operation to avoid blindly reducing the load during temperature fluctuations and prevent the emission concentration from unexpectedly exceeding the standard due to the coupling effect.

[0061] By constructing a closed-loop control system through real-time feedback of chimney emission concentration, and using exhaust gas temperature and electrostatic unit secondary current as constraints for comprehensive decoupling judgment, it ensures that the load does not exceed the equipment's safe discharge limit when increasing and does not exceed the standard due to front-end temperature fluctuations when decreasing the load. This achieves the dual goals of continuously and stably meeting emission concentration standards and dynamically optimizing operating energy consumption within the safety boundary, thereby improving the accuracy and reliability of intelligent collaborative treatment control of modified asphalt production exhaust gas.

[0062] Example 2 Based on the same inventive concept as the intelligent collaborative treatment and control method for modified asphalt production waste gas in the foregoing embodiments, such as Figure 3 As shown, this application provides an intelligent collaborative treatment and control system for modified asphalt production waste gas, wherein the intelligent collaborative treatment and control system for modified asphalt production waste gas includes: The waste gas collection module 11 is used to independently extract and collect multi-source waste gas from the modified asphalt production process under negative pressure. The waste gas treatment module 12 is used to perform three-stage cascade purification treatment on the multi-source waste gas to obtain treated clean gas. The waste gas emission module 13 is used to introduce the treated clean gas into the downstream main fan and discharge it at high altitude through the chimney, and a sensor array is set at the chimney emission outlet. The optimization control module 14 is used to detect the emission concentration at the chimney emission outlet in real time through the sensor array, use the detected value as a feedback signal, perform multi-variable decoupling calculations in combination with multiple process parameters in the purification process, and perform coordinated optimization control of the three-stage cascade purification process and the main fan according to the decoupling calculation results until the emission concentration is continuously stable within a preset range.

[0063] Furthermore, the exhaust gas collection module 11 is also used to: install negative pressure branch pipes with independent opening and closing control functions in the modified tank area branch pipe, the modified workshop branch pipe, the loading arm branch pipe, and the emulsified asphalt production area branch pipe; cool and condense the flue gas collected in the modified tank area branch pipe and the modified workshop branch pipe respectively through the water-cooled cooler of their respective branches; the cooled flue gas from the modified tank area, the flue gas from the modified workshop, and the flue gas collected in the loading arm branch pipe are then connected to the exhaust gas collection module 11 through negative pressure branch pipes equipped with electric butterfly valves. The main exhaust pipe; by adjusting the opening of the electric butterfly valves of each branch, the intake flow ratio of the three exhaust gas lines—the modified tank area branch, the modified workshop branch, and the loading arm branch—is controlled, so that the temperature of the mixed exhaust gas in the main exhaust pipe is maintained within a preset temperature range; the flue gas collected from the emulsified asphalt production area branch is used as an independent gas source, and the corresponding electric butterfly valve is opened and closed in conjunction with the start and stop signals of the emulsified asphalt production equipment to achieve a set flow rate and merge with the mixed exhaust gas in the main exhaust pipe to obtain the multi-source exhaust gas.

[0064] Furthermore, the exhaust gas collection module 11 is also used to: acquire the loading operation status signal of the loading arm branch; when the loading operation status signal indicates no loading operation, close the electric butterfly valve of the loading arm branch, adjust the opening degree of the electric butterfly valves of the modified tank area branch and the modified workshop branch, and adjust the circulating water flow rate of the corresponding water-cooled cooler to maintain the temperature of the mixed exhaust gas in the exhaust gas main pipe within the preset temperature range; when the loading operation status signal indicates loading operation, open the electric butterfly valve of the loading arm branch, so that the flue gas collected by the loading arm branch is used as a dilution gas source and flows into the exhaust gas main pipe.

[0065] Furthermore, the exhaust gas collection module 11 is also used for: collecting the temperature of the mixed exhaust gas at the inlet of the exhaust gas main; comparing the temperature of the mixed exhaust gas with a preset temperature range; when the temperature of the mixed exhaust gas is higher than the upper limit of the preset temperature range, increasing the opening of the electric butterfly valve of the loading arm branch; when the temperature is still higher than the upper limit of the preset temperature range after reaching the maximum limit, decreasing the opening of the electric butterfly valves of the modified tank area branch and the modified workshop branch, and simultaneously increasing the circulating water flow of the corresponding water-cooled cooler; when the temperature of the mixed exhaust gas is lower than the lower limit of the preset temperature range, decreasing the opening of the electric butterfly valve of the loading arm branch, increasing the opening of the electric butterfly valves of the modified tank area branch and the modified workshop branch, and simultaneously decreasing the circulating water flow of the corresponding water-cooled cooler; when the temperature of the mixed exhaust gas is within the preset temperature range, keeping the current opening of each butterfly valve unchanged.

[0066] Furthermore, the waste gas treatment module 12 is also used for: performing primary pretreatment on the multi-source waste gas by adjusting the spray liquid-gas ratio to remove dust and oil, and obtaining a first treated waste gas; sending the first treated waste gas into a wet electrostatic treatment unit for secondary wet electrostatic purification treatment, and obtaining a second treated waste gas; and sending the second treated waste gas into an activated carbon adsorption bed equipped with multiple temperature sensors for tertiary activated carbon adsorption treatment, and obtaining the treated clean gas.

[0067] Furthermore, the exhaust gas treatment module 12 is also used for: the wet electrostatic treatment unit is equipped with a flushing water flow detector and a high-voltage power controller; real-time monitoring of the flushing water flow of the flushing water flow detector; comparing the flushing water flow with a preset safe flow threshold; when the flushing water flow is lower than the safe flow threshold, automatically cutting off the high-voltage power output of the high-voltage power controller within a preset time and issuing a flushing water interruption alarm signal; when the flushing water flow recovers to above the safe flow threshold, automatically restoring the high-voltage power output after a preset delay.

[0068] Furthermore, the waste gas treatment module 12 is also used to: acquire temperature distribution data of each region of the activated carbon adsorption bed through the multi-point temperature sensor; when the temperature value of any region exceeds the first temperature threshold, activate forced airflow cooling to increase the gas flow rate through the region to reduce the temperature of the activated carbon adsorption bed; when the temperature value of any region exceeds the second temperature threshold, while maintaining the extraction, add atomized medium to the activated carbon adsorption bed for spray cooling and issue an over-temperature alarm signal; the second temperature threshold is higher than the first temperature threshold.

[0069] Furthermore, the optimization control module 14 is also used to: collect the emission concentration at the chimney outlet, collect the exhaust gas temperature at the inlet of the exhaust gas main pipe, the secondary current value of the wet electrostatic treatment unit, and the pressure value inside the exhaust gas main pipe; use the emission concentration as the emission status feedback quantity, and use the exhaust gas temperature, secondary current value, and pressure value as the collaborative adjustment reference quantity; compare the emission status feedback quantity with the preset range, and generate a collaborative adjustment command for the three-stage cascade purification treatment and the main fan based on the comparison result and the collaborative adjustment reference quantity, until the emission status feedback quantity stabilizes within the preset range.

[0070] Furthermore, the optimization control module 14 is also used to: generate a load increase adjustment command when the emission status feedback is higher than the preset range, increase the high voltage power output level of the high voltage power controller, and read the secondary current value; if the secondary current value exceeds the safe discharge range, lock the high voltage power output level; when the emission status feedback is lower than the preset range, generate a load decrease energy saving adjustment command, gradually reduce the high voltage power output level of the high voltage power controller, monitor the inlet temperature of the exhaust gas main pipe, and if the temperature fluctuation exceeds the allowable range, lock the high voltage power output level.

[0071] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The intelligent collaborative treatment and control method and specific examples of modified asphalt production waste gas in the foregoing embodiment one are also applicable to the intelligent collaborative treatment and control system of modified asphalt production waste gas in this embodiment. Through the foregoing detailed description of the intelligent collaborative treatment and control method of modified asphalt production waste gas, those skilled in the art can clearly understand the intelligent collaborative treatment and control system of modified asphalt production waste gas in this embodiment. Therefore, for the sake of brevity, it will not be described in detail here.

[0072] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0073] Obviously, those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. A method for intelligent collaborative treatment and control of waste gas from modified asphalt production, characterized in that, include: The modified asphalt production process to be treated is independently vacuumed and collected to obtain multi-source waste gas; The multi-source waste gas is subjected to a three-stage cascade purification treatment to obtain clean gas after treatment. The treated clean gas is introduced into the downstream main fan and discharged into the atmosphere through the chimney. A sensor array is installed at the chimney outlet. The sensor array is used to detect the emission concentration at the chimney outlet in real time. The detected value is used as a feedback signal and combined with multiple process parameters in the purification process to perform multivariate decoupling calculation. Based on the decoupling calculation results, the three-stage purification process and the main fan are coordinated and optimized until the emission concentration is continuously stable within the preset range.

2. The intelligent collaborative treatment and control method for modified asphalt production waste gas according to claim 1, characterized in that, The modified asphalt production process to be treated is independently vacuum-collected to obtain multi-source waste gas, including: Negative pressure branch pipes with independent opening and closing control functions are installed in the branch roads of the modified tank area, the branch roads of the modified workshop, the branch roads of the loading arms, and the branch roads of the emulsified asphalt production area. The flue gas collected from the modified tank area branch and the modified workshop branch is cooled and condensed by the water-cooled cooler of its respective branch. The cooled flue gas from the modified tank area and the modified workshop, together with the flue gas collected from the loading arm branch, are then merged into the exhaust gas main through negative pressure branch pipes equipped with electric butterfly valves. By adjusting the opening degree of the electric butterfly valves of each branch, the air intake flow ratio of the three exhaust gas branches of the modified tank area branch, the modified workshop branch, and the loading arm branch is controlled, so that the temperature of the mixed exhaust gas in the exhaust gas main pipe is maintained within the preset temperature range. The flue gas collected from the branch road of the emulsified asphalt production area is used as an independent gas source. The corresponding electric butterfly valve is opened and closed in conjunction with the start and stop signals of the emulsified asphalt production equipment to set the flow rate and merge with the mixed waste gas in the exhaust gas main pipe to obtain the multi-source waste gas.

3. The intelligent collaborative treatment and control method for modified asphalt production waste gas according to claim 2, characterized in that, By adjusting the opening degree of the electric butterfly valves in each branch, the intake flow ratio of the three exhaust gas lines—the modified tank area branch, the modified workshop branch, and the loading arm branch—is controlled, so that the temperature of the mixed exhaust gas in the main exhaust pipe is maintained within a preset temperature range, including: Obtain the loading operation status signal of the loading arm branch; When the loading operation status signal indicates that there is no loading operation, close the electric butterfly valve of the loading arm branch, adjust the opening of the electric butterfly valves of the modified tank area branch and the modified workshop branch, and adjust the circulating water flow of the corresponding water-cooled cooler to maintain the temperature of the mixed exhaust gas in the exhaust gas main pipe within the preset temperature range. When the loading operation status signal indicates that loading operation is in progress, the electric butterfly valve of the loading arm branch is opened, so that the flue gas collected by the loading arm branch is used as a dilution gas source and flows into the exhaust gas main.

4. The intelligent collaborative treatment and control method for modified asphalt production waste gas according to claim 3, characterized in that, When the loading operation status signal indicates that a loading operation has occurred, it also includes: Collect the temperature of the mixed exhaust gas at the inlet of the exhaust gas main; The temperature of the mixed exhaust gas is compared with a preset temperature range; When the temperature of the mixed exhaust gas is higher than the upper limit of the preset temperature range, the opening of the electric butterfly valve of the loading arm branch is increased. When the temperature is still higher than the upper limit of the preset temperature range after reaching the maximum limit, the opening of the electric butterfly valve of the modified tank area branch and the modified workshop branch is reduced, and the circulating water flow of the corresponding water-cooled cooler is increased simultaneously. When the temperature of the mixed exhaust gas is lower than the lower limit of the preset temperature range, the opening of the electric butterfly valve of the loading arm branch is reduced, the opening of the electric butterfly valve of the modified tank area branch and the modified workshop branch is increased, and the circulating water flow of the corresponding water-cooled cooler is reduced simultaneously. When the temperature of the mixed exhaust gas is within the preset temperature range, the current opening degree of each butterfly valve remains unchanged.

5. The intelligent collaborative treatment and control method for modified asphalt production waste gas according to claim 1, characterized in that, The multi-source waste gas is subjected to a three-stage cascade purification treatment to obtain clean gas, including: The multi-source waste gas is subjected to primary pretreatment, which involves dust removal, oil removal, and washing by adjusting the liquid-to-gas ratio of the spray to obtain the first treated waste gas. The first treated waste gas is sent into a wet electrostatic treatment unit for secondary wet electrostatic purification treatment to obtain the second treated waste gas. The second waste gas is fed into an activated carbon adsorption bed equipped with multiple temperature sensors for three-stage activated carbon adsorption treatment to obtain the treated clean gas.

6. The intelligent collaborative treatment and control method for modified asphalt production waste gas according to claim 5, characterized in that, The first treated waste gas is sent to a wet electrostatic treatment unit for secondary wet electrostatic purification to obtain a second treated waste gas, which also includes: The wet electrostatic treatment unit is equipped with a flushing water flow detector and a high-voltage power controller. Real-time monitoring of the flushing water flow rate by the flushing water flow detector; The flushing water flow rate is compared with a preset safe flow rate threshold. When the flushing water flow rate is lower than the safe flow rate threshold, the high-voltage power output of the high-voltage power controller is automatically cut off within a preset time, and a flushing water flow interruption alarm signal is issued. When the flushing water flow rate recovers to above the safe flow rate threshold, the high-voltage power output is automatically restored after a preset delay.

7. The intelligent collaborative treatment and control method for modified asphalt production waste gas according to claim 5, characterized in that, The second waste gas is fed into an activated carbon adsorption bed equipped with multiple temperature sensors for three-stage activated carbon adsorption treatment to obtain the treated clean gas, including: The temperature distribution data of each region of the activated carbon adsorption bed is obtained by the multi-point temperature sensor. When the temperature value in any region exceeds the first temperature threshold, forced airflow cooling is activated to increase the gas flow rate through the region in order to reduce the temperature of the activated carbon adsorption bed. When the temperature value in any area exceeds the second temperature threshold, while maintaining the pumping, atomized medium is added to the activated carbon adsorption bed for spray cooling, and an over-temperature alarm signal is issued. The second temperature threshold is higher than the first temperature threshold.

8. The intelligent collaborative treatment and control method for modified asphalt production waste gas according to claim 6, characterized in that, The sensor array is used to detect the emission concentration at the chimney outlet in real time. The detected value is used as a feedback signal, and multivariate decoupling calculations are performed on multiple process parameters in the purification process. Based on the decoupling calculation results, the three-stage purification process and the main fan are coordinated and optimized until the emission concentration remains stable within a preset range, including: The emission concentration at the chimney outlet, the exhaust gas temperature at the inlet of the exhaust gas main, the secondary current value of the wet electrostatic treatment unit, and the pressure value inside the exhaust gas main are collected. The emission concentration is used as the emission status feedback quantity, and the exhaust gas temperature, secondary current value and pressure value are used as the collaborative adjustment reference quantities. The emission status feedback quantity is compared with the preset range, and based on the comparison result and the coordinated adjustment reference quantity, a coordinated adjustment command for the three-stage cascade purification treatment and the main fan is generated until the emission status feedback quantity stabilizes within the preset range.

9. The intelligent collaborative treatment and control method for modified asphalt production waste gas according to claim 8, characterized in that, Based on the comparison results and the aforementioned coordinated adjustment reference values, coordinated adjustment commands are generated for the three-stage cascade purification treatment and the main fan, including: When the emission status feedback is higher than the preset range, a load increase adjustment command is generated to increase the high voltage power output level of the high voltage power controller and read the secondary current value. If the secondary current value exceeds the safe discharge range, the high voltage power output level is locked. When the emission status feedback is lower than the preset range, a load reduction and energy-saving adjustment command is generated to gradually reduce the high-voltage power output level of the high-voltage power controller and monitor the inlet temperature of the exhaust gas main. If the temperature fluctuation exceeds the allowable range, the high-voltage power output level is locked.

10. A smart collaborative treatment and control system for modified asphalt production waste gas, characterized in that, The steps for implementing the intelligent collaborative treatment and control method for modified asphalt production waste gas according to any one of claims 1 to 9, wherein the intelligent collaborative treatment and control system for modified asphalt production waste gas includes: The waste gas collection module is used to independently extract and collect waste gas from multiple sources by negative pressure during the production of modified asphalt. The waste gas treatment module is used to perform three-stage cascade purification treatment on the multi-source waste gas to obtain clean gas after treatment. The exhaust gas emission module is used to introduce the treated clean gas into the downstream main fan, and discharge it at high altitude through the chimney, and to install a sensor array at the chimney emission outlet. The optimized control module is used to detect the emission concentration at the chimney outlet in real time through the sensor array, use the detected value as a feedback signal, perform multivariate decoupling calculations in combination with multiple process parameters in the purification process, and perform coordinated optimization control of the three-stage cascade purification process and the main fan based on the decoupling calculation results until the emission concentration is continuously stable within a preset range.

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